On Sun, Jan 15, 2012 at 10:10 AM, Matthias Fuchs <matthias.fu...@esd.eu> wrote:
> That's what I also tried. But from the ref manual I got no idea. > When we do not find a hy to deassert the chip select manually, we cannot > avoid this read. I was assuming that the chip select deassertion was correctly being handled by the mxs_spi_end_xfer function. This function handles the LOCK_CS and IGNORE_CRC bits that are responsible for chip select assertion/deassertion. >From the MX28 Reference Manual: "IGNORE_CRC bit: In SPI/SSI modes: When set to 1, deassert the chip select (SSn) pin after the command is executed." Then I tought that mxs_spi_end_xfer should be also called in the case where bitlen==0. In current code this does not happen. > It seems that the mainline linux only implements a GPIO based SPI driver. > So we cannot take it for reference. There is no mxs spi driver in the mainline kernel yet. _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
